ScreenRant just released a bit more of blurb about Bookish Series 2 and some info is very interesting to pay attention to, which will be spoiler
ScreenRant usually shared things that the show want us to pay attention to, since there is no "official" synopsis released by UOriginal or Mark's camp any "spoiler" that they released is an official snippet to make people excited for the show.
The first thing that ScreenRant highlighted is the reunion between Mark and Rupert Graves. This is probably to garner excitement from Sherlock's fandom to tune in to see how this reunion will play out even when during Sherlock these two barely have any scenes together. This can be just a marketing strategy but can also imply Rupert's character, Reggie Winters, might be important. Until we got further trailer or blurb we won't know.
Secondly, we got a bit more detailed about episode 3 of series 2. Last year when series two were announced, Mark shared about the theme for each episode. For episode 3, he only stated that it was a Christmas theme set in a German castle but now ScreenRant has "confirmed" that it is indeed set in a German castle and will be an Agatha Christie-esque murder case.
In the latest trailer, we could see Gabriel stood in front of a castle on snowing mountain while someone walking away toward said castle. Make me think that the trailer scenes are from each episode 1, 2, 3 in sequence. We also going to get more about Felix (Jack's father and Gabriel's lover) and possibly what happened to him and more about Gabriel's history. Even in the book, Gabriel barely talked about his time in Germany but it was implied he knew intelligent information that not many know.
Anyway, the last point that I find interesting is that we will understand about Gabriel's motivation to work with the police. In Series 1 Episode 3 when Edmund Kind talked with Gabriel in the underground bar, Edmund had told Gabriel how it was dangerous for Gabriel to work so closely with the police. Gabriel only smiled and said that he had his reasons and it seems we will finally learn about the reason behind Gabriel's sudden willingness to work with the police.
Also, to note, Eyepatch man from series 1 definitely knows that Gabriel with the police and he keep an eye on Gabriel's movement
